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Serum Calprotectin Levels in Different Subtypes of Juvenile Idiopathic Arthritis (JIA) and Its Correlation with
F Remthangpuii1, Anu Maheshwari2, Sameer Gulati3
1Department of Pediatrics, Lady Hardinge Medical College and associated Kalawati Saran Children's Hospital, New Delhi, India.
Insights
Serum calprotectin levels are elevated in children with juvenile idiopathic arthritis (JIA). These levels positively correlate with C-reactive protein (CRP) and JIA disease activity scores.
Area of Science:
- Pediatric Rheumatology
- Immunology
- Biomarker Research
Background:
- Juvenile idiopathic arthritis (JIA) is a chronic autoimmune disease affecting children.
- Accurate biomarkers are needed to assess JIA disease activity and inflammation.
- Calprotectin is a known marker of inflammation, but its role in JIA requires further investigation.
Purpose of the Study:
- To investigate serum calprotectin levels in children diagnosed with JIA.
- To evaluate the correlation between serum calprotectin, C-reactive protein (CRP), and the Juvenile Arthritis Disease Activity Score-27 (JADAS-27) in JIA patients.
Main Methods:
- A cross-sectional observational study involving 50 treatment-naive children (aged 1-18 years) with JIA.
- Disease activity assessed using JADAS-27.
- Serum calprotectin and CRP levels measured via immunoassay.
- Statistical analysis to determine correlations.
Main Results:
- Serum calprotectin levels in JIA patients were significantly higher than reported in literature.
- No statistically significant difference in calprotectin levels across different JIA subtypes.
- A positive correlation was observed between serum calprotectin and CRP (r=0.418).
- Serum calprotectin also showed a positive correlation with JADAS-27 (r=0.418).
Conclusions:
- Serum calprotectin is elevated in children with JIA, regardless of subtype.
- Serum calprotectin serves as a potential biomarker, correlating positively with established markers of inflammation (CRP) and disease activity (JADAS-27) in JIA.
Objective:
To study the serum calprotectin levels in children with juvenile idiopathic arthritis (JIA) and correlate it with C-reactive protein (CRP) and the Juvenile Arthritis Disease Activity Score-27 (JADAS-27).
Methods:
This was a cross-sectional observational study done between November 2017 and March 2019. Fifty treatment-naive children, aged 1 to 18 y with the diagnosis of JIA as per the International League of Associations of Rheumatology (ILAR) criteria were enrolled. Assessment of disease activity was done according to the Juvenile Arthritis Disease Activity Score (JADAS-27). Determination of serum calprotectin and CRP levels was done by immunoassay. The correlation between calprotectin levels with CRP and JADAS-27 was calculated.
Results:
Of the 50 patients with JIA included in the study, there were 18 female and 32 male children. The median age of presentation to the hospital was 9 y (IQR 5.82-13). The median JADAS-27 was 14 (IQR 6, 20.25). The median serum calprotectin level was 45,375 ng/mL (IQR 30,725, 52,270; range 8,560-63,160 ng/mL). The median CRP was 35.4 mg/L (IQR 3.48, 80.3; range 0.02 and 107.4 mg/L). The levels of calprotectin in different JIA subtypes were not statistically different using Kruskal-Wallis test. The study also demonstrated a positive correlation between serum calprotectin with CRP and the JADAS-27 (r = 0.418).
Conclusion:
The calprotectin levels in JIA were significantly higher than those reported in the literature irrespective of the subtype. Serum calprotectin positively correlated with CRP and JADAS-27 in children with JIA.
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